CISPR 22 specified the radio disturbance limits for information technology equipment and the methods by which the disturbance was measured. It applied to a very wide range of products including computers, peripherals, network equipment and telecom terminals, and it distinguished between class B equipment intended for the domestic environment, for which the limits were stricter, and class A equipment intended for commercial and industrial use. The standard covered conducted disturbance at the mains port in the frequency range from 150 kHz to 30 MHz and radiated disturbance from 30 MHz to 1 GHz, and it defined the measurement distance, the detector and bandwidth settings, and the operating conditions that made the equipment produce its maximum emission. It has been withdrawn and replaced by CISPR 32, which recasts the requirements as an emission standard for multimedia equipment and harmonises them with the corresponding European standard. Certificates issued against CISPR 22 remain valid only while the original scheme allows, so the page is retained mainly for legacy approvals.